president obama warns a first step alone won't be good enough and that now is the time to act. athena jones has more. >> i'm here because most americans agree that it's time to fix the system that's been broken for way too long. >> reporter: this new attempt to overhaul america's immigration system comes from both ends of pennsylvania avenue and from both parties. >> we cannot continue as a nation with 11 million people residing in the shadows. >> we believe we have a window of opportunity to act. >> reporter: with a bipartisan group of senators outlining a plan to strengthen border security, improve enforcement of existing laws and provide a way for undocumented immigrants already here to become citizes.s that plan is in line with guidelines the president announced a day later. >> if congress is unable to move forward in a timely fashion, i will send up a bill based on my proposal and insist that they vote on it right away. >> reporter: but congress hasn't passed a comprehensive immigration bill in nearly 30 years, despite several attempts. >> we will fix the problems created